The Activity Instance Monitor administers and monitors the execution of activity instances, generates alert notifications for potential system problems (e.g., prolonged activity execution delay), and provides a set of dynamic activity restructuring operations for the modification of the execution path of a particular activity instance. The administration tasks include starting and stopping activity instances, and querying activity instance execution histories. The monitoring tasks include animated activity state changes, active execution tracing, and problem alerts. The activity restructuring interface also provides a facility for flexible change adaptation policy specifications on relevant affected activity instances (e.g., a set of instances working for a cooperative task). This component is launched by the Activity Specification Pilot for activity instances on an one-to-one basis.